When water is frozen into ice, its volume expands with a extreme strength. That force is able to break pipes and even boats. In geology this is called ice jacking and is responsible of a form of rock erosion.
In this video, a plumbing fitting bursts because of the expansion of the ice when water if freezing.
https://en.wikipedia.org/wiki/Ice_jacking
https://en.wikipedia.org/wiki/Ice
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